k8s常用命令（增）

修改标签edit

[root@master ~]# kubectl run  nginx --image nginx --labels "app=test"
pod/nginx created
[root@master ~]# kubectl get pods
NAME                    READY   STATUS    RESTARTS   AGE
nginx                   1/1     Running   0          34s


[root@master ~]# kubectl edit pods/nginx
pod/nginx edited

......
# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: "2021-12-20T14:00:18Z"
  labels:
    app: nginx     #标签

[root@master ~]# kubectl describe pods nginx
Name:         nginx
Namespace:    default
Priority:     0
Node:         node1.example.com/192.168.244.147
Start Time:   Mon, 20 Dec 2021 22:00:18 +0800
Labels:       app=nginx    #标签
Annotations:  <none>
Status:       Running
IP:           10.244.1.8
IPs:
  IP:  10.244.1.8
Containers:
  nginx:
    Container ID:   docker://d876d1fca12075c74c8058bc0d1f7900923a327366dbe8ce89873140baad8318
    Image:          nginx
    Image ID:       docker-pullable://nginx@sha256:9522864dd661dcadfd9958f9e0de192a1fdda2c162a35668ab6ac42b465f0603
    Port:           <none>
    Host Port:      <none>
    State:          Running
      Started:      Mon, 20 Dec 2021 22:00:34 +0800
    Ready:          True
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-sfqmp (ro)
Conditions:
  Type              Status
  Initialized       True 
  Ready             True 
  ContainersReady   True 
  PodScheduled      True 
Volumes:
  default-token-sfqmp:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  default-token-sfqmp
    Optional:    false
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                 node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
  Type    Reason     Age    From               Message
  ----    ------     ----   ----               -------
  Normal  Scheduled  3m52s  default-scheduler  Successfully assigned default/nginx to node1.example.com
  Normal  Pulling    3m52s  kubelet            Pulling image "nginx"
  Normal  Pulled     3m36s  kubelet            Successfully pulled image "nginx" in 15.556640756s
  Normal  Created    3m36s  kubelet            Created container nginx
  Normal  Started    3m36s  kubelet            Started container nginx

回滚rollout

[root@master ~]# kubectl rollout --help
.......
Examples:
  # Rollback to the previous deployment   #回滚到以前的部署
  kubectl rollout undo deployment/abc
  
  # Check the rollout status of a daemonset  #检查守护进程的转出状态
  kubectl rollout status daemonset/foo
........

[root@master ~]# kubectl create deployment nginx --image nginx
deployment.apps/nginx created
[root@master ~]# kubectl get pods
NAME                     READY   STATUS    RESTARTS   AGE
nginx                    1/1     Running   0          41m
nginx-6799fc88d8-hqrl4   1/1     Running   0          26s

[root@master ~]# kubectl rollout undo deployment/nginx

扩展scale

（增减）扩展deployment类型的nginx容器或其他类型

[root@master ~]# kubectl scale  --help
........
Examples:
  # Scale a replicaset named 'foo' to 3.
  kubectl scale --replicas=3 rs/foo
  
  # Scale a resource identified by type and name specified in "foo.yaml" to 3.
  kubectl scale --replicas=3 -f foo.yaml
  
  # If the deployment named mysql's current size is 2, scale mysql to 3.
  kubectl scale --current-replicas=2 --replicas=3 deployment/mysql
  
  # Scale multiple replication controllers.
  kubectl scale --replicas=5 rc/foo rc/bar rc/baz
  
  # Scale statefulset named 'web' to 3.
  kubectl scale --replicas=3 statefulset/web


#创建一个deployment类型的容器
[root@master ~]# kubectl create deployment nginx --image nginx
deployment.apps/nginx created
[root@master ~]# 
[root@master ~]# kubectl get pods
NAME                     READY   STATUS              RESTARTS   AGE
nginx                    1/1     Running             0          2m12s
nginx-6799fc88d8-tw4qw   0/1     ContainerCreating   0          15s

#增减
[root@master ~]# kubectl scale --replicas 5 deployment/nginx
deployment.apps/nginx scaled

[root@master ~]# kubectl get pods
NAME                     READY   STATUS    RESTARTS   AGE
nginx                    1/1     Running   0          3m49s
nginx-6799fc88d8-7wpkj   1/1     Running   0          43s
nginx-6799fc88d8-8swjc   1/1     Running   0          43s
nginx-6799fc88d8-mc84k   1/1     Running   0          43s
nginx-6799fc88d8-rgd6w   1/1     Running   0          43s
nginx-6799fc88d8-tw4qw   1/1     Running   0          112s

#减少
[root@master ~]# kubectl scale --replicas 3 deployment/nginx
deployment.apps/nginx scaled
[root@master ~]# kubectl get pods
NAME                     READY   STATUS        RESTARTS   AGE
nginx                    1/1     Running       0          5m11s
nginx-6799fc88d8-7wpkj   1/1     Running       0          2m5s
nginx-6799fc88d8-8swjc   1/1     Running       0          2m5s
nginx-6799fc88d8-mc84k   0/1     Terminating   0          2m5s   #正在删除
nginx-6799fc88d8-rgd6w   0/1     Terminating   0          2m5s
nginx-6799fc88d8-tw4qw   1/1     Running       0          3m14s


[root@master ~]# kubectl get pods
NAME                     READY   STATUS    RESTARTS   AGE
nginx                    1/1     Running   0          5m29s
nginx-6799fc88d8-7wpkj   1/1     Running   0          2m23s
nginx-6799fc88d8-8swjc   1/1     Running   0          2m23s
nginx-6799fc88d8-tw4qw   1/1     Running   0          3m32s

自动扩展autoscale

（定制一个最小范围和一个最大范围，当容器服务访问量过大时就会自动增加容器减轻负担，但不增加容器会超出指定范围）

[root@master ~]# kubectl autoscale --help
......
Examples:
  # Auto scale a deployment "foo", with the number of pods between 2 and 10, no target CPU utilization specified so a default autoscaling policy will be used:
  kubectl autoscale deployment foo --min=2 --max=10
  
  # Auto scale a replication controller "foo", with the number of pods between 1 and 5, target CPU utilization at 80%:
  kubectl autoscale rc foo --max=5 --cpu-percent=80

#百分比 percent

[root@master ~]# kubectl get pods
NAME                     READY   STATUS    RESTARTS   AGE
nginx                    1/1     Running   0          12m
nginx-6799fc88d8-7wpkj   1/1     Running   0          9m43s
nginx-6799fc88d8-8swjc   1/1     Running   0          9m43s
nginx-6799fc88d8-tw4qw   1/1     Running   0          10m

#最少5个最多10个
[root@master ~]# kubectl autoscale --min 5 --max 10 --cpu-percent=50 deployment/nginx
horizontalpodautoscaler.autoscaling/nginx autoscaled
#水平自动控伸缩制器

5个nginx容器
[root@master ~]# kubectl get pods
NAME                     READY   STATUS    RESTARTS   AGE
nginx                    1/1     Running   0          15m
nginx-6799fc88d8-7wpkj   1/1     Running   0          12m
nginx-6799fc88d8-8qtsj   1/1     Running   0          39s
nginx-6799fc88d8-8swjc   1/1     Running   0          12m
nginx-6799fc88d8-svs9q   1/1     Running   0          39s
nginx-6799fc88d8-tw4qw   1/1     Running   0          13m

#查看
[root@master ~]# kubectl get hpa
NAME    REFERENCE          TARGETS         MINPODS   MAXPODS   REPLICAS   AGE
nginx   Deployment/nginx   <unknown>/50%   5         10        5          6m59s

#删除
[root@master ~]# kubectl delete hpa nginx
horizontalpodautoscaler.autoscaling "nginx" deleted
[root@master ~]# kubectl get hpa
No resources found in default namespace.

describe 显示一个指定容器详情

[root@master ~]# kubectl describe pods/nginx
Name:         nginx
Namespace:    default
Priority:     0
Node:         node1.example.com/192.168.244.147
Start Time:   Mon, 20 Dec 2021 22:22:43 +0800
Labels:       run=nginx
Annotations:  <none>
Status:       Running
IP:           10.244.1.12
IPs:
  IP:  10.244.1.12
Containers:
  nginx:
    Container ID:   docker://d1a4871b7bc5cabffc5d25b4edc5be2107084c7ae04d054c43d3cc1ac4138809
    Image:          nginx
    Image ID:       docker-pullable://nginx@sha256:9522864dd661dcadfd9958f9e0de192a1fdda2c162a35668ab6ac42b465f0603
    Port:           <none>
    Host Port:      <none>
    State:          Running
      Started:      Mon, 20 Dec 2021 22:23:00 +0800
    Ready:          True
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-sfqmp (ro)
Conditions:
  Type              Status
  Initialized       True 
  Ready             True 
  ContainersReady   True 
  PodScheduled      True 
Volumes:
  default-token-sfqmp:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  default-token-sfqmp
    Optional:    false
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                 node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
  Type    Reason     Age   From               Message
  ----    ------     ----  ----               -------
  Normal  Scheduled  46m   default-scheduler  Successfully assigned default/nginx to node1.example.com
  Normal  Pulling    46m   kubelet            Pulling image "nginx"
  Normal  Pulled     46m   kubelet            Successfully pulled image "nginx" in 15.476004289s
  Normal  Created    46m   kubelet            Created container nginx
  Normal  Started    46m   kubelet            Started container nginx

logs 输出容器在 pod 中的日志

[root@master ~]# kubectl logs --help
.......
Examples:
  # Return snapshot logs from pod nginx with only one container
  kubectl logs nginx
  
  # Return snapshot logs from pod nginx with multi containers
  kubectl logs nginx --all-containers=true
  
  # Return snapshot logs from all containers in pods defined by label app=nginx
  kubectl logs -lapp=nginx --all-containers=true
  
  # Return snapshot of previous terminated ruby container logs from pod web-1
  kubectl logs -p -c ruby web-1
  
  # Begin streaming the logs of the ruby container in pod web-1
  kubectl logs -f -c ruby web-1
  
  # Begin streaming the logs from all containers in pods defined by label app=nginx
  kubectl logs -f -lapp=nginx --all-containers=true
  
  # Display only the most recent 20 lines of output in pod nginx
  kubectl logs --tail=20 nginx
  
  # Show all logs from pod nginx written in the last hour
  kubectl logs --since=1h nginx
  
  # Show logs from a kubelet with an expired serving certificate
  kubectl logs --insecure-skip-tls-verify-backend nginx
  
  # Return snapshot logs from first container of a job named hello
  kubectl logs job/hello
  
  # Return snapshot logs from container nginx-1 of a deployment named nginx
  kubectl logs deployment/nginx -c nginx-1





[root@master ~]# kubectl logs nginx
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2021/12/20 14:23:00 [notice] 1#1: using the "epoll" event method
2021/12/20 14:23:00 [notice] 1#1: nginx/1.21.4
2021/12/20 14:23:00 [notice] 1#1: built by gcc 10.2.1 20210110 (Debian 10.2.1-6) 
2021/12/20 14:23:00 [notice] 1#1: OS: Linux 4.18.0-305.3.1.el8.x86_64
2021/12/20 14:23:00 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2021/12/20 14:23:00 [notice] 1#1: start worker processes
2021/12/20 14:23:00 [notice] 1#1: start worker process 31
2021/12/20 14:23:00 [notice] 1#1: start worker process 32
2021/12/20 14:23:00 [notice] 1#1: start worker process 33
2021/12/20 14:23:00 [notice] 1#1: start worker process 34




#查看deployment类型的日志
[root@master ~]# kubectl logs  deployment/nginx
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2021/12/20 15:04:13 [notice] 1#1: using the "epoll" event method
2021/12/20 15:04:13 [notice] 1#1: nginx/1.21.4
2021/12/20 15:04:13 [notice] 1#1: built by gcc 10.2.1 20210110 (Debian 10.2.1-6) 
2021/12/20 15:04:13 [notice] 1#1: OS: Linux 4.18.0-305.3.1.el8.x86_64
2021/12/20 15:04:13 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2021/12/20 15:04:13 [notice] 1#1: start worker processes
2021/12/20 15:04:13 [notice] 1#1: start worker process 31
2021/12/20 15:04:13 [notice] 1#1: start worker process 32
2021/12/20 15:04:13 [notice] 1#1: start worker process 33
2021/12/20 15:04:13 [notice] 1#1: start worker process 34

attach Attach 到一个运行中的容器

[root@master ~]# kubectl attach nginx
Defaulting container name to nginx.
Use 'kubectl describe pod/nginx -n default' to see all of the containers in this pod.
If you don't see a command prompt, try pressing enter.

exec 在一个 容器中执行一个命令

#在容器运行命令
[root@master ~]# kubectl exec nginx -- date
Mon Dec 20 15:27:17 UTC 2021

[root@master ~]# kubectl exec nginx -- ls /usr/local
bin
etc
games
include
lib
man
sbin
share
src



#进入一个容器
[root@master ~]# kubectl get pods
NAME                     READY   STATUS    RESTARTS   AGE
nginx                    1/1     Running   0          61m
nginx-6799fc88d8-hqrl4   1/1     Running   0          20m
[root@master ~]# kubectl exec -it nginx-6799fc88d8-hqrl4 -- /bin/bash
root@nginx-6799fc88d8-hqrl4:/# ls
bin                   etc    mnt   sbin  var
boot                  home   opt   srv
dev                   lib    proc  sys
docker-entrypoint.d   lib64  root  tmp
docker-entrypoint.sh  media  run   usr
root@nginx-6799fc88d8-hqrl4:/# 


#创建一个service
[root@master ~]# kubectl get pods
NAME                     READY   STATUS    RESTARTS   AGE
nginx                    1/1     Running   0          68m
nginx-6799fc88d8-hqrl4   1/1     Running   0          26m
[root@master ~]# kubectl get svc
NAME         TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   2d1h
[root@master ~]#  kubectl expose deployment nginx --port 8080 --target-port 80
service/nginx exposed
[root@master ~]# kubectl get svcNAME         TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)    AGE
kubernetes   ClusterIP   10.96.0.1        <none>        443/TCP    2d1h
nginx        ClusterIP   10.108.199.210   <none>        8080/TCP   4s

[root@master ~]# kubectl exec -it svc/nginx  /bin/bash
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead.
root@nginx-6799fc88d8-hqrl4:/# ls
bin                   etc    mnt   sbin  var
boot                  home   opt   srv
dev                   lib    proc  sys
docker-entrypoint.d   lib64  root  tmp
docker-entrypoint.sh  media  run   usr

port-forward 将一个或多个本地端口转发到pod（端口映射）

[root@master ~]# kubectl port-forward --help
....
Examples:
  # Listen on ports 5000 and 6000 locally, forwarding data to/from ports 5000 and 6000 in the pod
  kubectl port-forward pod/mypod 5000 6000
  
  # Listen on ports 5000 and 6000 locally, forwarding data to/from ports 5000 and 6000 in a pod selected by the deployment
  kubectl port-forward deployment/mydeployment 5000 6000
  
  # Listen on port 8443 locally, forwarding to the targetPort of the service's port named "https" in a pod selected by the service
  kubectl port-forward service/myservice 8443:https
  
  # Listen on port 8888 locally, forwarding to 5000 in the pod
  kubectl port-forward pod/mypod 8888:5000
  
  # Listen on port 8888 on all addresses, forwarding to 5000 in the pod
  kubectl port-forward --address 0.0.0.0 pod/mypod 8888:5000
  
  # Listen on port 8888 on localhost and selected IP, forwarding to 5000 in the pod
  kubectl port-forward --address localhost,10.19.21.23 pod/mypod 8888:5000
  
  # Listen on a random port locally, forwarding to 5000 in the pod
  kubectl port-forward pod/mypod :5000


#在前台运行
[root@master ~]#  kubectl port-forward pod/nginx  8080:80
Forwarding from 127.0.0.1:8080 -> 80
Forwarding from [::1]:8080 -> 80

cp 把文件复制到容器里或把容器里的文件cp到容器外

[root@master ~]#  kubectl exec nginx -- ls /tmp
[root@master ~]#
[root@master ~]# ls
anaconda-ks.cfg  kube-flannel.yml  node2
flannel          node1
[root@master ~]#  kubectl cp /root/anaconda-ks.cfg nginx:/tmp
[root@master ~]# kubectl exec nginx -- ls /tmp
anaconda-ks.cfg

label 更新在这个资源上的 labels（标签）

[root@master ~]# kubectl describe  deployment/nginx
Name:                   nginx
Namespace:              default
CreationTimestamp:      Mon, 20 Dec 2021 23:03:57 +0800
Labels:                 app=nginx
Annotations:            deployment.kubernetes.io/revision: 1
Selector:               app=nginx
Replicas:               1 desired | 1 updated | 1 total | 1 available | 0 unavailable
StrategyType:           RollingUpdate
MinReadySeconds:        0
RollingUpdateStrategy:  25% max unavailable, 25% max surge
Pod Template:
  Labels:  app=nginx
  Containers:
   nginx:
    Image:        nginx
    Port:         <none>
    Host Port:    <none>
    Environment:  <none>
    Mounts:       <none>
  Volumes:        <none>
Conditions:
  Type           Status  Reason
  ----           ------  ------
  Available      True    MinimumReplicasAvailable
  Progressing    True    NewReplicaSetAvailable
OldReplicaSets:  <none>
NewReplicaSet:   nginx-6799fc88d8 (1/1 replicas created)
Events:
  Type    Reason             Age   From                   Message
  ----    ------             ----  ----                   -------
  Normal  ScalingReplicaSet  46m   deployment-controller  Scaled up replica set nginx-6799fc88d8 to 1

#修改标签
[root@master ~]# kubectl label  deployment nginx --overwrite trueapp=test
deployment.apps/nginx labeled
[root@master ~]# 
[root@master ~]# kubectl label  deployment  --overwrite pod nginx  app=test
deployment.apps/nginx not labeled
Error from server (NotFound): deployments.apps "pod" not found
[root@master ~]#  kubectl describe  deployment/nginx
Name:                   nginx
Namespace:              default
CreationTimestamp:      Mon, 20 Dec 2021 23:03:57 +0800
Labels:                 app=test   #nginx修改成test
                        trueapp=test
Annotations:            deployment.kubernetes.io/revision: 1
Selector:               app=nginx
Replicas:               1 desired | 1 updated | 1 total | 1 available | 0 unavailable
StrategyType:           RollingUpdate
MinReadySeconds:        0
RollingUpdateStrategy:  25% max unavailable, 25% max surge
Pod Template:
  Labels:  app=nginx
  Containers:
   nginx:
    Image:        nginx
    Port:         <none>
    Host Port:    <none>
    Environment:  <none>
    Mounts:       <none>
  Volumes:        <none>
Conditions:
  Type           Status  Reason
  ----           ------  ------
  Available      True    MinimumReplicasAvailable
  Progressing    True    NewReplicaSetAvailable
OldReplicaSets:  <none>
NewReplicaSet:   nginx-6799fc88d8 (1/1 replicas created)
Events:
  Type    Reason             Age   From                   Message
  ----    ------             ----  ----                   -------
  Normal  ScalingReplicaSet  52m   deployment-controller  Scaled up replica set nginx-6799fc88d8 to 1
[root@master ~]# 

api-resources 命令简称

[root@master ~]#  kubectl api-resources
NAME                              SHORTNAMES   APIVERSION                             NAMESPACED   KIND
bindings                                       v1                                     true         Binding
componentstatuses                 cs           v1                                     false        ComponentStatus
configmaps                        cm           v1                                     true         ConfigMap
endpoints                         ep           v1                                     true         Endpoints
events                            ev           v1                                     true         Event
limitranges                       limits       v1                                     true         LimitRange
namespaces                        ns           v1                                     false        Namespace
nodes                             no           v1                                     false        Node
persistentvolumeclaims            pvc          v1                                     true         PersistentVolumeClaim
persistentvolumes                 pv           v1                                     false        PersistentVolume
pods                              po           v1                                     true         Pod
podtemplates                                   v1                                     true         PodTemplate
replicationcontrollers            rc           v1                                     true         ReplicationController
resourcequotas                    quota        v1                                     true         ResourceQuota
secrets                                        v1                                     true         Secret
serviceaccounts                   sa           v1                                     true         ServiceAccount
services                          svc          v1                                     true         Service
mutatingwebhookconfigurations                  admissionregistration.k8s.io/v1        false        MutatingWebhookConfiguration
validatingwebhookconfigurations                admissionregistration.k8s.io/v1        false        ValidatingWebhookConfiguration
customresourcedefinitions         crd,crds     apiextensions.k8s.io/v1                false        CustomResourceDefinition
apiservices                                    apiregistration.k8s.io/v1              false        APIService
controllerrevisions                            apps/v1                                true         ControllerRevision
daemonsets                        ds           apps/v1                                true         DaemonSet
deployments                       deploy       apps/v1                                true         Deployment
replicasets                       rs           apps/v1                                true         ReplicaSet
statefulsets                      sts          apps/v1                                true         StatefulSet
tokenreviews                                   authentication.k8s.io/v1               false        TokenReview
localsubjectaccessreviews                      authorization.k8s.io/v1                true         LocalSubjectAccessReview
selfsubjectaccessreviews                       authorization.k8s.io/v1                false        SelfSubjectAccessReview
selfsubjectrulesreviews                        authorization.k8s.io/v1                false        SelfSubjectRulesReview
subjectaccessreviews                           authorization.k8s.io/v1                false        SubjectAccessReview
horizontalpodautoscalers          hpa          autoscaling/v1                         true         HorizontalPodAutoscaler
cronjobs                          cj           batch/v1beta1                          true         CronJob
jobs                                           batch/v1                               true         Job
certificatesigningrequests        csr          certificates.k8s.io/v1                 false        CertificateSigningRequest
leases                                         coordination.k8s.io/v1                 true         Lease
endpointslices                                 discovery.k8s.io/v1beta1               true         EndpointSlice
events                            ev           events.k8s.io/v1                       true         Event
ingresses                         ing          extensions/v1beta1                     true         Ingress
flowschemas                                    flowcontrol.apiserver.k8s.io/v1beta1   false        FlowSchema
prioritylevelconfigurations                    flowcontrol.apiserver.k8s.io/v1beta1   false        PriorityLevelConfiguration
ingressclasses                                 networking.k8s.io/v1                   false        IngressClass
ingresses                         ing          networking.k8s.io/v1                   true         Ingress
networkpolicies                   netpol       networking.k8s.io/v1                   true         NetworkPolicy
runtimeclasses                                 node.k8s.io/v1                         false        RuntimeClass
poddisruptionbudgets              pdb          policy/v1beta1                         true         PodDisruptionBudget
podsecuritypolicies               psp          policy/v1beta1                         false        PodSecurityPolicy
clusterrolebindings                            rbac.authorization.k8s.io/v1           false        ClusterRoleBinding
clusterroles                                   rbac.authorization.k8s.io/v1           false        ClusterRole
rolebindings                                   rbac.authorization.k8s.io/v1           true         RoleBinding
roles                                          rbac.authorization.k8s.io/v1           true         Role
priorityclasses                   pc           scheduling.k8s.io/v1                   false        PriorityClass
csidrivers                                     storage.k8s.io/v1                      false        CSIDriver
csinodes                                       storage.k8s.io/v1                      false        CSINode
storageclasses                    sc           storage.k8s.io/v1                      false        StorageClass
volumeattachments                              storage.k8s.io/v1                      false        VolumeAttachment



[root@master ~]# kubectl get po
NAME                     READY   STATUS    RESTARTS   AGE
nginx                    1/1     Running   0          99m
nginx-6799fc88d8-hqrl4   1/1     Running   0          58m

api-versions 在服务器上打印支持的API版本，以“group/version”的形式

[root@master ~]#  kubectl api-versions 
admissionregistration.k8s.io/v1
admissionregistration.k8s.io/v1beta1
apiextensions.k8s.io/v1
apiextensions.k8s.io/v1beta1
apiregistration.k8s.io/v1
apiregistration.k8s.io/v1beta1
apps/v1
authentication.k8s.io/v1
authentication.k8s.io/v1beta1
authorization.k8s.io/v1
authorization.k8s.io/v1beta1
autoscaling/v1
autoscaling/v2beta1
autoscaling/v2beta2
batch/v1
batch/v1beta1
certificates.k8s.io/v1
certificates.k8s.io/v1beta1
coordination.k8s.io/v1
coordination.k8s.io/v1beta1
discovery.k8s.io/v1beta1
events.k8s.io/v1
events.k8s.io/v1beta1
extensions/v1beta1
flowcontrol.apiserver.k8s.io/v1beta1
networking.k8s.io/v1
networking.k8s.io/v1beta1
node.k8s.io/v1
node.k8s.io/v1beta1
policy/v1beta1
rbac.authorization.k8s.io/v1
rbac.authorization.k8s.io/v1beta1
scheduling.k8s.io/v1
scheduling.k8s.io/v1beta1
storage.k8s.io/v1
storage.k8s.io/v1beta1
v1

version 输出 client 和 server 的版本信息

[root@master ~]#  kubectl version 
Client Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.0", GitCommit:"af46c47ce925f4c4ad5cc8d1fca46c7b77d13b38", GitTreeState:"clean", BuildDate:"2020-12-08T17:59:43Z", GoVersion:"go1.15.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.0", GitCommit:"af46c47ce925f4c4ad5cc8d1fca46c7b77d13b38", GitTreeState:"clean", BuildDate:"2020-12-08T17:51:19Z", GoVersion:"go1.15.5", Compiler:"gc", Platform:"linux/amd64"}